High voltage primary cut-out



Dec. 31, 1935. G. H. FIEDLER HIGH VOLTAGE PRIMARY CUT-OUT Filed Maron13, 1934 g v f////////////////// ik W 8 t w Cal Patented Dec. 31, 1935UNITED STATES PATENT OFFICE George H. Fiedler, Rochester, N. Y.,assignor to General Electric Company, a corporation of New YorkApplication March 13, 1934, Serial No. 715,312

4 Claims.

My invention relates to high voltage primary cut-outs and has for itsobject the provision of indicating means for indicating the condition ofthe circuit through the cut-out.

Another object of my invention is to provide indicating means forenclosed fuse cut-outs which will indicate an open circuit through thecut-out while maintaining the cut-out and the 'casing cover in theirrespective normal operating positions.

For a better understanding of my invention, together with other andfurther objects thereof, reference is had to the following description,

taken in connection with the accompanying drawing, and its scope will bepointed out in the appended claims.

The accompanying drawing illustrates a sectional side view of a highvoltage primary cutout for outdoor use equipped with a signaling devicebuilt in accordance with my invention. The signaling device is shown inits closed-circuit indicating position in full lines and in itsopen-circuit indicating position in dotted lines.

Referring to the drawing in detail, the cut-out comprises mainly anenclosing casing I which contains the stationary contact clips 2 and 3for a fuse 4 and a closing cover 5 which supports the fuse and moves itinto engagement with the contact clips 2 and 3 when the cover is movedinto closing position on the casing I.

The casing I comprises a rectangular receptacle madeof thick porcelainand cast into a single piece. The casing is open in front and isprovided with two petticoat insulators B and` 'I cast integral with theback of the casing, by means of whichthe casing may be convenientlymounted. The Contact clips 2 and 3 are respectively mounted on bosses 8and 9 projecting from the back in the casing. Ilhe clips may be mountedon the bosses in any convenient manner. The particular methodillustrated comprises a collar II, wedged into a hole I2 in the boss,into which the screw I3 is turned. Cables to the clips may be broughtinto the casing through two conduits I4 and I5 in the side of the casingand may be attached respectively to the cable terminals i6 and I1 whichare connected to the clips 'and are supported adjacent the inner ends ofthe conduits. The cable terminal I6 is attached to a terminal strip I8by a screw I9, which in turn is held in contact with fuse clip 2 by ascrew I3. The terminal I1 is attached similarly to a terminal strip 2Dby a-screw 2I and the strip 20 is held in contact with clip 3 by anotherscrew I3.

The fuse 4 is mounted onA the cover 5 by means (Cl. 20G-121) of a springclip 23 which engages the lower section of the fuse and a collar 24which engages the upper end of the fuse 4. The spring clip 23 is similarto the clips 2 and 3 and simply engages the lower part of the fuse` Itis attached to the 5 cover 5 in any convenient manner. The collar 24 ismounted upon a boss 26 projecting inwardly from the cover and isattached thereto by means of a tongue 2l projecting from the collar atapproximately 45. The surface of the boss 28 be- :10 ing vertical, thecollar 24 is positioned about 45 to the normal operating position of thefuse when it is so attached.l This construction provides an easy methodof mounting the fuse on the cover. In order to mount the fuse, it isonly l5 necessary to insert the upper end of the fuse into the collar 24while holding the fuse at approximately 45o to the cover and then movingthe lower end of the fuse inwardly'into engage-` ment with the clip 23.This movement brings the 20 outer end of the fuse into intimate contactwith the edges of the collar and is held there by a U-shaped spring 2Bwhich is mounted underneath the collar tongue and exerts pressureagainst the fuse.

The cover which may be either hooked or hinged at the bottom may beforced into position by means of an integral loop 28 cast upon the upperiront portion of the cover. When the cover is in this position thecasingi is completely closed and the fuse 4 is simultaneously moved intoengagement with the spring clips 2 and 3.

In accordance with my invention, the cover 5 is provided with asignaling vane 3D comprising a plate oi any convenient material andpreferably approximately the area or size of the cover 5. It is providedat its lower end with a pair oi arms 3l projecting vertically from thevane over the edges of the cover 5. The arms are pivoted by means ofpivot screws 32 on the cover so that the vane may be held in a verticalposition parallel to the cover 5 or in a horizontal position at rightangles to the cover. An opening 33 is provided in the vane so that theloop 29 may project therethrough and permit the mounting of 45 this vaneclose to the cover.

The signaling vane is further provided with a latch hook 34 whichprojects through a hole 35 in the cover 5 when the vane is parallel. tothe cover. This hook projects through the cover 50 and engages a latch36, which in turn is pivoted on an arm 31 mounted on the inside of thecover 5. The latch 36 is normally moved upwardly against a stop 38 by aspring 40. In this position, the latch 36 engages the hook 34. The latch55 'to the' face of the cover.

^may be tripped by a latch arm il which extends over the upper end ofthe fuse t and is operated by a plunger l2 which moves upwardly when thefuse circuit is broken.

The fuse l is of the rei'lllable expulsion type and is provided at itsupper end with a springoperated plunger d2. It comprises an insulatingtube J3 containing the fuse link lili which is attached at itsrespective ends to leads l5 and 66. The lead 55 is attached to a metalcontact sleeve d'1 at the lower end of the fuse and is locked of the'sliding sleeve and clamps the disk 50 be-- tween. itself and the web.The contact sleeve 52 is screwed on to the upper end of the fuse sleevei3 and is lalsoprovided with a web through which the insulating tubeprojects. When the fuse link 44 ,is intact, the sliding sleeve 5I ismoved downwardly against the pressure of a spring 5t, the sleeve 5Ibeing pulled down inside of the contact sleeve 52 until a slightshoulder on the sleeve engages the end of the contact sleeve 52. Athimble provided with an opening through its top is screwed over the endof the contact sleeve so that when the plunger and sliding'sleeve are inthis position theend of the plunger 'ls ush with the thimble. When thefuse link 46 then'breaks the plunger is moved upwardly into engagementwith the tripping arm il of the latch 66 and thus disengages the hook34. This enables a `spring 55 on the vane to move the signaling vaneinto the horizontal position indicated in dotted lines in the drawing'.

In operation the fuse d, with the plunger retracted, is mounted on thecover and the signaling vane is latched into the position parallel 'I'hefuse and cover are then moved into the operating position where the fuseengages the contacts and the cover closes the casing and protects thefuse and the contacts.r When the fuse link breaks, due to an overload orany other reason, thev plunger trips the latch and the signaling vanedrops into its horizontal position. My invention, therefore,

'provides a simple method of indicating the condition of an enclosedfuse without interfering(- with the protecting casing.

fuse link breaks.

What I claim as new and desire to secure by Letters Patent of the UnitedStates, is:

1. In a cut-out device, the combination of a fuse, a casing therefor, acover for said casing,

a signaling member having substantially the 5 2. In a primary cut-out,thercombination of an 15 outdoor casing provided with stationarycontacts,

a cover for said casing, a fuse supported thereby and moved intoengagement with said contacts when said cover is in position to closesaid casing, a signaling member comprising a vane hav- 20 ingsubstantially the same area as said cover pivoted on saidv cover, meansfor maintaining said member in one signaling position parallel to saidcover when the said fuse is operative, and meansoperated when said fusebreaks for moving said 2 member into a second signaling positionsubstantially at right angles to said cover vwhereby the cover isconcealed in the rst position of said member and exposed in the secondposition thereof. 30

'operating said latch and moving said signaling vane into a secondposition.

4. In a primary cut-out device, the combina tion of a casing and a covertherefor, a signaling 45- member pivoted on the outside of said cover,latching means provided on theinside of said cover for holding saidsignaling member in one position, Vand a fuse mounted within said casingprovided With'a fuse link and a retractible plung- 50 er for operatingsaid latch and moving said signaling member to a second position whensaid `GEORGE H. EIEDLER.

